One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,4,6)(3,7,8,5)(9,10)(11,14)(12,13)(15,16)(17,18,21,26)(19,24,28,23)(20,25,29,32)(22,27,30,31)(1,3,4,8)(2,5,6,7)(17,19,21,28)(18,23,26,24)(20,22,29,30)(25,31,32,27)(10,13)(14,16)(17,19,22,20,21,28,30,29)(18,24,27,25,26,23,31,32)(17,20,22,28,21,29,30,19)(18,25,27,23,26,32,31,24)(9,11,12,15)(10,14,13,16)(18,26)(23,24)(25,32)(27,31)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.